Question about Sony Televison & Video
According to the service manual identify the part number and then search the Internet: http://diagramas.diagramasde.com/televisores/Sony%20FIX12%20KDL-40XBR4,%20KDL-40XBR5,%20KDL-46XBR4,%20KDL-46XBR5%20LCD%20TV.pdf
Search results for KDL 40XBR4 board
7results for Sony kdl40xbr4 mainboard
Posted on Apr 22, 2015
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Posted on Jan 02, 2017
A 6 flash failure indicates a backlight problem, either from the backlight inverter board or the backlights in the panel failing. There is a simple problem that sometimes causes this; loose screws holding the boards in place. You can try removing the power, taking the back off the set and tightening down the screws that secure the boards to the frame. the screws are aatually a ground connection and if they are loose it can cause problems. if this doesn't help, you will need a tech to look at it.
Posted on Nov 15, 2008
The blinking light is a problem code.
Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
But, I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you blinking light codes, circuit diagrams, test points, and part# lists. Usually, cost under $20. And most cases the new part cost less than $15.
I hope I shed some light on the subject for you.
Posted on Jul 05, 2009
It can be replaced, but it is probably going to cost you more then the cost of a new TV to do it.
Read the tech tip I wrote on this very subject.
Posted on Jan 07, 2010
Shock... death, is the first, Um well it's not too hard if your methodical and careful. have a reconnoiter first and have a look at what you need to do, familiarize yourself & go over it in your mind, and with POWER OFF, Plug removed, remove old board, draw a diagram of any wires plugs etc.keep/put screws all together. Insert new board, reconnect the wires, plugs etc, then put the screws back in. NOW stand back, and turn on.... Umm as an aside here we do know why the LCD controller board went faulty, huh?
Posted on Feb 09, 2010
The part # you gave is the Control Board which sells for $668.79. The T-Con board your looking for is part of the LCD Display Panel and is not sold separately. I suggest you start by cleaning the ribbon cables from the control board to the t-con board. If that doesn't help then you had better take it in to a service center to verify which part is bad because there are no refunds, only replacement after you buy a board.
Posted on Nov 19, 2010
Tips for a great answer:
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